B01D 2321/162
Use of acids
B01D2321/162 (Use of acids) appears on 142 US grants and 186 published applications in this corpus.
Search patents in B01D- Granted patents
- 142
- Published applications
- 186
- Assignees
- 138
- Inventors
- 567
- Latest grant
- 18 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 4 | 0 |
| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
| 1982 | 1 | 0 |
| 1983 | 1 | 0 |
| 1984 | 2 | 0 |
| 1985 | 2 | 0 |
| 1986 | 1 | 0 |
| 1987 | 4 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 1 | 0 |
| 1993 | 3 | 0 |
| 1994 | 3 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 2 | 0 |
| 1998 | 0 | 0 |
| 1999 | 6 | 0 |
| 2000 | 2 | 0 |
| 2001 | 4 | 1 |
| 2002 | 4 | 2 |
| 2003 | 1 | 3 |
| 2004 | 4 | 7 |
| 2005 | 2 | 4 |
| 2006 | 2 | 5 |
| 2007 | 0 | 6 |
| 2008 | 2 | 6 |
| 2009 | 1 | 4 |
| 2010 | 1 | 10 |
| 2011 | 0 | 5 |
| 2012 | 5 | 4 |
| 2013 | 8 | 7 |
| 2014 | 1 | 7 |
| 2015 | 3 | 9 |
| 2016 | 5 | 13 |
| 2017 | 2 | 11 |
| 2018 | 7 | 15 |
| 2019 | 8 | 7 |
| 2020 | 8 | 6 |
| 2021 | 7 | 12 |
| 2022 | 8 | 7 |
| 2023 | 6 | 5 |
| 2024 | 5 | 8 |
| 2025 | 5 | 10 |
| 2026 | 4 | 12 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Method for operating separation membrane module, computer-readable recording medium having program recorded thereon, and water production system18 Aug 2026US 12,708,878 B2Toray Industries, Inc.
- Chemical product comprising an anionic surfactant, chelant, and enzyme, and process for cleaning nanofiltration and reverse osmosis membranes7 Apr 2026US 12,595,436 B2Petroleo Brasileiro S.A. - Petrobras
- Methods for treating porous membranes24 Mar 2026US 12,582,944 B2Apache Corporation
- Biocide composition and method20 Jan 2026US 12,528,050 B2Acculab Co., Ltd.
- Film cleaning solution and method for cleaning film2 Dec 2025US 12,485,387 B2Tokyo Ohka Kogyo.Co., Ltd.
- Modular multi-filter systems and methods of use1 Oct 2026US 2026/0295538 A1Pentair Water Pool and Spa, Inc.
- Ultra-low power membrane-assisted lithium extraction system with passive foulant removal24 Sep 2026US 2026/0284598 A1Lyten, Inc.
- Cleaning method of membrane housing, membrane housing cleaned by the cleaning method, and ultrapure water manufacturing apparatus including the membrane housing17 Sep 2026US 2026/0273471 A1Organo Corporation
- Container and water treatment system20 Aug 2026US 2026/0241342 A1Yokogawa Electric Corporation
- Processing method for polyamide-based semipermeable membrane, production method and processing apparatus for semipermeable membrane element, and fluid processing method and fluid processing apparatus each using semipermeable membrane element23 Jul 2026US 2026/0208120 A1Toray Industries, Inc.
Most cited
By later US patents
- Pyrogens separations by ceramic ultrafiltration122US 5,104,546 AAluminum Company of America · 1992
- Method and apparatus for high efficiency reverse osmosis operation122US 5,925,255 A1999
- Method of back-washing submerged-type ceramic membrane separation apparatus106US 5,647,988 AKubota Corporation · 1997
- Cleaning composition84US 4,496,470 AThe B. F. Goodrich Company · 1985
- Method for purifying aqueous suspension79US 6,322,703 B1Asahi Kasei Kabushiki Kaisha · 2001